You could be with your partner for years at this point, but maybe you don't know everything about your significant other or at least not as much as you think that you do.
When I get married next year, I will have been with my now-fiancé for almost four years, and living together for two and a half of those years. I can promise you that it has not always been exciting, but honestly, it's the times when we have been bored together that have been some of the best.
When your partner is going through something, whether that be the death of a family member or a change at work, you would want to support them in any way that you can.
You can find so many lists of questions you should and should not ask on a first date, however there are some questions that you wouldn't think to ask, but they can reveal a lot about your date.